Abstract: An industrial operations network is disclosed herein. More particularly the disclosure may pertain to an industrial operations network designed for facilitating the training of security concepts for industrial operations. In one embodiment, an apparatus for training industrial security concepts is disclosed. The apparatus may comprise a portable industrial operations network comprising: at least one router; at least one firewall; at least one programmable logic controller; and at least one display connected to the portable industrial operations network, said at least one display adapted to display, at different times, normal operating conditions of said portable industrial operations network and security fault conditions in said portable industrial operations network.

Abstract: An industrial operations network is disclosed herein. More particularly the disclosure may pertain to an industrial operations network designed for facilitating the training of security concepts for industrial operations. In one embodiment, an apparatus for training industrial security concepts is disclosed. The apparatus may comprise a portable industrial operations network comprising: at least one router; at least one firewall; at least one programmable logic controller; and at least one display connected to the portable industrial operations network, said at least one display adapted to display, at different times, normal operating conditions of said portable industrial operations network and security fault conditions in said portable industrial operations network.

Abstract: In a particular embodiment, a method includes receiving a powered device (PD) detection signal at a PD from a powered network and applying the PD detection signal to an external resistor to provide a detection signature to the powered network. Further, the method includes receiving a PD classification mark signal at the PD, applying the received PD classification mark signal to the external resistor, and selectively activating a classification mark current path in parallel with the external resistor to produce a classification mark signature.

Abstract: Methods, devices and kits are described for making a growing substrate from recycled coffee grounds and growing mushrooms.

Abstract: In a particular embodiment, a method includes receiving a powered device (PD) detection signal at a PD from a powered network and applying the PD detection signal to an external resistor to provide a detection signature to the powered network. Further, the method includes receiving a PD classification mark signal at the PD, applying the received PD classification mark signal to the external resistor, and selectively activating a classification mark current path in parallel with the external resistor to produce a classification mark signature.

Abstract: The present invention concerns itself with methods and systems for just intonation tuning of a digital/electrical piano in real time. A simple and economical solution is presented, which makes use of a PLC (i.e., Programmable Logic Controller), having 13 inputs (an octave plus one input for the pedal) and 22 outputs (22 possible frequencies per octave), relays, and parallel connections between octaves and PLC inputs, as well as, between PLC outputs and relays.

Abstract: In a particular embodiment, a method includes receiving a powered device (PD) detection signal at a PD from a powered network and applying the PD detection signal to an external resistor to provide a detection signature to the powered network. Further, the method includes receiving a PD classification mark signal at the PD, applying the received PD classification mark signal to the external resistor, and selectively activating a classification mark current path in parallel with the external resistor to produce a classification mark signature.

Abstract: In a particular embodiment, a method includes receiving a powered device (PD) detection signal at a PD from a powered network and applying the PD detection signal to an external resistor to provide a detection signature to the powered network. Further, the method includes receiving a PD classification mark signal at the PD, applying the received PD classification mark signal to the external resistor, and selectively activating a classification mark current path in parallel with the external resistor to produce a classification mark signature.